6
4.3.2.
Communication System Configuration
Termination Configuration
Figure 3. Termination Configuration
Pin S
GND
T2
T1
N
P
Role Shield
Ground Termination
Signal
line
S : Use only one point in the whole network lines for grounding.
Connect to the screw next to the shield terminal when grounding through the inverter.
GND : Ground of communication terminal.
T1, T2 : If the option card is installed within the inverter which is to be placed at the end of the
network trunk line, short terminals T1 and T2. This allows the internal termination resistor
(120
Ω
) to be connected.
4.3.3. Communication Protocol Selection (RS485/Modbus-RTU)
z
Setting method
The Modbus-RTU protocol is selected when the No.1(among the DIP switches located on the lower
right corner of the option card) is ON, and RS485 protocol is selected when the No.1 is OFF. That’s
the same for both SV-iP5A, SV-iV5.
(At this time the On/Off status of the No.2, 3, 4 DIP switches has not an effect on the protocol
selection.)
ON
1
2
3
4
Option
Card
Inverter n
note1)
Inverter 2
Inverter 1
Master
(Ex:PC,PLC)
……
Option
Card
Option
Card
232/485
Converter
S
GND
T2
T1
N
P
Æ
RS485 protocol selection
